It was a glycoprotein containing 2.7% sugar by phenol-sulfuric acid reaction.

胶原蛋白为一种糖蛋白，经硫酸-苯酚法测定，其含糖量为2.7%。

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It was a glycoprotein containing 2.7% sugar by phenol-sulfuric acid reaction.

胶原蛋白为一种糖蛋白，经硫酸-苯酚法测定，其含糖量为2.7%。

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